Comparison of Signal Processing Techniques for Power Quality Disturbances

685-689This paper presents the comparison of the signal processing techniques for detecting the power quality disturbances using wavelet transform and Mathematical Morphology Transform (MMT). Different power system events such as voltage sag and voltage swell are simulated and processed to the signal processing techniques, thereby generating wavelet coefficients from wavelet transform for db5 mother wavelet, and by using Structural Element (SE) from the MMT. The power system events are classified based on the value of energy and standard deviation for the samples of power system events. This paper also deals with the merits and demerits of the signal processing techniques. The classified output showed that the MMT had more compatibility for identifying the events than the wavelet transform